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INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES (Details) (USD $) | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended | 81 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 63 Months Ended | 12 Months Ended |  | 12 Months Ended | 67 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 properties | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 properties | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2011 Unconsolidated Affiliates [Member] | Dec. 31, 2010 Unconsolidated Affiliates [Member] | Dec. 31, 2009 Unconsolidated Affiliates [Member] | Dec. 31, 2011 Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2010 Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2009 Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 KLA/Mervyns LLC Add-On Investments [Member] | Dec. 31, 2011 KLA A Markets LLC Add-On Investments [Member] | Dec. 31, 2011 KA-Shopko LLC [Member] | Dec. 31, 2011 Marsh and Add-On Investments [Member] | Dec. 31, 2011 KLAC Rex Venture LLC [Member] | Dec. 31, 2011 KLA/Mervyns LLC [Member] | Dec. 31, 2011 KLA A Markets LLC [Member] | Dec. 31, 2011 Mervyns I and Mervyns II [Member] KLA/Mervyns LLC Add-On Investments [Member] | Dec. 31, 2011 Mervyns I and Mervyns II [Member] KLA/Mervyns LLC [Member] | Dec. 31, 2011 Mervyns II [Member] KLA A Markets LLC Add-On Investments [Member] | Dec. 31, 2011 Mervyns II [Member] KLAC Rex Venture LLC [Member] | Dec. 31, 2011 Mervyns II [Member] KLA A Markets LLC [Member] | Dec. 31, 2011 Fund II [Member] KA-Shopko LLC [Member] | Dec. 31, 2011 Fund II [Member] Marsh and Add-On Investments [Member] | Dec. 31, 2011 Core Portfolio [Member] | Dec. 31, 2010 Core Portfolio [Member] | Dec. 31, 2009 Core Portfolio [Member] | Dec. 31, 2011 Core Portfolio [Member] Brandywine Portfolio [Member] sqft | Dec. 31, 2011 Core Portfolio [Member] Crossroads [Member] sqft | Sep. 30, 2011 Core Portfolio [Member] Georgetown Portfolio [Member] properties | Dec. 31, 2011 Opportunity Funds [Member] | Dec. 31, 2010 Opportunity Funds [Member] | Dec. 31, 2009 Opportunity Funds [Member] | Dec. 31, 2011 Opportunity Funds [Member] RCP Venture [Member] | Dec. 31, 2011 Opportunity Funds [Member] RCP Venture [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns I and Mervyns II [Member] KLA/Mervyns LLC Add-On Investments [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns I and Mervyns II [Member] KLA/Mervyns LLC Add-On Investments [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns I and Mervyns II [Member] KLA/Mervyns LLC Add-On Investments [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2004 Opportunity Funds [Member] Mervyns I and Mervyns II [Member] KLA/Mervyns LLC [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns I and Mervyns II [Member] KLA/Mervyns LLC [Member] stores | Dec. 31, 2011 Opportunity Funds [Member] Mervyns I and Mervyns II [Member] KLA/Mervyns LLC [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC Add-On Investments [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC Add-On Investments [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC Add-On Investments [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLAC Rex Venture LLC [Member] | Jul. 31, 2007 Opportunity Funds [Member] Mervyns II [Member] KLAC Rex Venture LLC [Member] retail_properties | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLAC Rex Venture LLC [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC [Member] | Dec. 31, 2010 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC [Member] | Jun. 30, 2006 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC [Member] | Dec. 31, 2011 Opportunity Funds [Member] Mervyns II [Member] KLA A Markets LLC [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund II [Member] KA-Shopko LLC [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund II [Member] KA-Shopko LLC [Member] Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund II [Member] KA Marsh LLC [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund II [Member] Add-On Investments [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund II [Member] Marsh and Add-On Investments [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund II [Member] Marsh and Add-On Investments [Member] Operating Partnership, as General Partner or Managing Member [Member] | Jun. 29, 2010 Opportunity Funds [Member] Fund II [Member] CityPoint [Member] | Mar. 25, 2010 Opportunity Funds [Member] Fund I [Member] Sterling Heights Shopping Center [Member] | Dec. 31, 2009 Opportunity Funds [Member] Fund I [Member] Sterling Heights Shopping Center [Member] | Dec. 31, 2011 Opportunity Funds [Member] Fund I [Member] Sterling Heights Shopping Center [Member] | Jun. 30, 2010 Opportunity Funds [Member] Fund III [Member] locations
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22.20% | 49.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00%
Square Footage of Real Estate Property (in feet) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 | 311,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reclassification of Notes Receivable to Investments in and Advances to Unconsolidated Affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Properties Collateralized | 29 |  |  |  |  |  |  |  | 29 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Stores |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 262 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,200,000 | 26,058,000 | 4,901,000 |  |  |  |  |  |  | 20,717,000 |  | 20,717,000 | 20,700,000 | 4,239,000 |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  |  |  |  |  |  |  | 54,981,000 | 19,116,000 | 5,603,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Dividends or Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45,966,000 | 11,251,000 |  |  |  |  |  |  | 4,500,000 | 11,400,000 | 81,594,000 |  | 16,318,000 |  |  |  |  |  |  |  |  |  |  |
Cost Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,517,000 | 6,517,000 | 1,046,000 |  |  |  | 2,416,000 | 2,416,000 | 388,000 | 2,701,000 | 2,700,000 | 535,000 |  |  |  |  |  | 1,108,000 | 222,000 | 700,000 | 2,000,000 | 2,667,000 | 533,000 |  |  |  |  |
Investment Income, Dividend |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 137,935,000 | 29,752,000 | 1,900,000 | 3,558,000 | 819,000 |  |  |  | 500,000 | 1,679,000 | 336,000 | 840,000 |  | 168,000 |  |  |  |  |  | 1,659,000 | 332,000 |  |  | 2,639,000 | 528,000 |  |  |  |  |
Number of Retail Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 87 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.50% | 20.00% | 20.00% | 20.00% | 13.30% | 10.50% | 18.90% | 5.80% | 5.80% | 6.00% | 13.30% | 5.70% | 2.00% | 3.30% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Net Sales Proceeds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,300,000 |  |  |
Gains (Losses) on Recourse Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 600,000 |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24.75% |  |  |  |
Number of Locations Owned |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14
Combined and Condensed Balance Sheets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental property, net |  |  |  |  |  |  |  |  |  |  |  | 280,470,000 | 186,802,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments in and advances to unconsolidated affiliates | 84,568,000 |  |  |  | 31,036,000 |  |  |  | 84,568,000 | 31,036,000 |  | 156,421,000 | 192,002,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,184,000 | 11,864,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  |  |  |  | 29,587,000 | 27,841,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets | 1,653,319,000 |  |  |  | 1,524,806,000 |  |  |  | 1,653,319,000 | 1,524,806,000 | 1,382,464,000 | 466,478,000 | 406,645,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 633,345,000 | 574,497,000 | 558,240,000 |  |  |  | 901,758,000 | 772,715,000 | 607,706,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  |  |  |  |  |  |  |  |  | 319,425,000 | 267,565,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other liabilities | 20,437,000 |  |  |  | 20,279,000 |  |  |  | 20,437,000 | 20,279,000 |  | 16,902,000 | 13,815,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' equity |  |  |  |  |  |  |  |  |  |  |  | 130,151,000 | 125,265,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities and partners' equity | 1,653,319,000 |  |  |  | 1,524,806,000 |  |  |  | 1,653,319,000 | 1,524,806,000 |  | 466,478,000 | 406,645,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company's share of distributions in excess of share of income and investments in unconsolidated affiliates | (21,710,000) |  |  |  | (20,884,000) |  |  |  | (21,710,000) | (20,884,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Combined and Condensed Statements of Operations [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | 38,213,000 | 36,656,000 | 37,845,000 | 37,447,000 | 36,044,000 | 36,302,000 | 33,997,000 | 34,702,000 | 150,161,000 | 141,045,000 | 134,445,000 | 42,185,000 | 29,460,000 | 30,835,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,994,000 | 57,084,000 | 64,249,000 |  |  |  | 55,888,000 | 42,062,000 | 37,375,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating and other expenses |  |  |  |  |  |  |  |  | 104,129,000 | 95,506,000 | 97,830,000 | 15,924,000 | 10,617,000 | 9,851,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  | 17,099,000 | 13,525,000 | 13,786,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates |  |  |  |  |  |  |  |  | 1,555,000 | 10,971,000 | (1,529,000) | 7,243,000 | 56,482,000 | (30,568,000) | 1,555,000 | 10,971,000 | (5,297,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 32,986,000 | 28,808,000 | 27,612,000 | 8,837,000 | 4,839,000 | 5,152,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,206,000 | 13,798,000 | 14,595,000 |  |  |  | 15,454,000 | 10,898,000 | 10,480,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on sale of property, net |  |  |  |  |  |  |  |  |  |  |  | 0 | (2,957,000) | (390,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 11,548,000 | 47,335,000 | 1,844,000 | 7,568,000 | 54,004,000 | (28,912,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,946,000 | 11,363,000 | (1,141,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  |  |  |  | 0 | 0 | (3,768,000) |  |  |  | 0 | 0 | (3,768,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,800,000) |  |
Amortization of excess investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (391,000) | $ (392,000) | $ (388,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
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